Fig. 4. Tube formation capacity of gbMSCs and HUVECs incubated in different media.

a Angiogenic capacity of CD90^high and CD90^low gbMSCs cultured in 0%DMEM, 10%DMEM, 0%gb-CM and S-gb-CM for 6 h on Matrigel (×100, scale bars = 100 µm). (n ≥ 3) *P < 0.05, **P < 0.01, ***P < 0.001. b Angiogenic capacity of HUVECs cultured in 0%DMEM, CD90^high CM and CD90^low CM for 6 h on Matrigel (×100, scale bars = 100 µm). (n ≥ 3) *P < 0.05, **P < 0.01. c Attachment capacity of DiO-labelled CD90^low and CD90^high gbMSCs onto vascular structures formed by HUVECs in 0%gb-CM (×100, scale bars = 100 µm). (n ≥ 3) *P < 0.05 and **P < 0.01